Add Obj365 train SAM2 mask annotations for Stage 3

.gitattributes

@@ -68,3 +68,4 @@ annotations/InTheWild_v3_train_human_only.json filter=lfs diff=lfs merge=lfs -te
 annotations/InTheWild_v3_train_synthetic.json filter=lfs diff=lfs merge=lfs -text
 masks/obj365/obj365_val_with_masks.json filter=lfs diff=lfs merge=lfs -text
 masks/v3det/v3det_2023_v1_masks_all.json filter=lfs diff=lfs merge=lfs -text
+masks/obj365/obj365_train_with_masks.json filter=lfs diff=lfs merge=lfs -text

masks/obj365/obj365_train_with_masks.json

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8f70a8bfc2bed94bb398d7533b28ccc50b39e9c3b01f21fa56da6b8864bb9e17
+size 5417186820